US3567943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radioactive plating for radioactive foils
Assignee: NUCLEAR RADIATION DEVELOPMENTS
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Filing: 1967-07-19
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Granted: 1971-03-02
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Expires: 1987-07-19
Abstract
Abstract A radioactive product, and particularly a radioactive foil, comprising a radioactive core and a protective plating disposed over the core comprising gold alloyed with from 0.10 to 25.0 percent by weight of cobalt, cadmium, nickel, copper or silver.
Inventors
- 👤 Clarence W Wallhausen
- 👤 Walter F Buck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:44
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; G21G4/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
42 words
In a radioactive core, an improved protective plating disposed over said core comprising an alloy of gold and from about 0.10 to 25.0 per cent by weight of an element selected from the group consisting of cobalt, cadmium, nickel, copper and silver.
Claim 2
Dependent Claim
42 words
In a radioactive core, an improved protective plating disposed over said core comprising an alloy of gold and from about 0.10 to 25.0 per cent by weight of an element selected from the group consisting of cobalt, cadmium, nickel, copper and silver.
Claim 3
Dependent Claim
28 words
A radioactive product according to claim 1 wherein the plating alloy consists essentially of gold and from 0.1 to 4.0 per cent by weight of cobalt or cadmium.
Claim 4
Dependent Claim
27 words
A radioactive product according to claim 1 wherein a metallic sealing layer is disposed over the core and the protective plating is disposed over the sealing layer.
Claim 5
Dependent Claim
44 words
A radioactive product according to claim 3 in the form of a foil wherein the core is a sheet and the sealing layer is laminated to and covers the opposite sides of the core sheet, said plating covering all exterior surfaces of the foil.
Claim 6
Dependent Claim
24 words
A radioactive product according to claim 4 which also includes a silver or gold backing layer laminated to and reinforcing the remainder of foil.
Claim 7
Dependent Claim
15 words
A radioactive product according to claim 4 wherein the metallic sealing layer is of gold.
Claim 8
Dependent Claim
57 words
In a radioactive foil comprising a radioactive core sheet on the opposite sides of which are laminated at least one gold sealing layer and a silver or gold backing layer, an improved protective plating covering the exterior of the foil comprising an alloy of gold and from 0.1 to 4.0 percent by weight of cobalt or cadmium.
Claim 9
Dependent Claim
57 words
In a radioactive foil comprising a radioactive core sheet on the opposite sides of which are laminated at least one gold sealing layer and a silver or gold backing layer, an improved protective plating covering the exterior of the foil comprising an alloy of gold and from 0.1 to 4.0 percent by weight of cobalt or cadmium.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |